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Comprehensive quantitative analysis of vector beam states based on vector field reconstruction.

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We developed a vector field reconstruction (VFR) technique for analyzing vector beam states. This method precisely quantifies polarization structured beams, achieving 98% purity for a specific radial polarization state.

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Area of Science:

  • Optics and Photonics
  • Quantum Optics
  • Laser Physics

Background:

  • Vector beam states (VBSs) are crucial in advanced optical applications.
  • Characterizing complex polarization structures requires precise analytical methods.

Purpose of the Study:

  • To introduce and validate a novel vector field reconstruction (VFR) technique for comprehensive quantitative analysis of VBSs.
  • To demonstrate the efficacy of VFR using cylindrically polarized Laguerre-Gaussian (LG) mode expansion.

Main Methods:

  • Integration of interferometry and imaging polarimetry for VFR.
  • Complex amplitude reconstruction of VBSs.
  • Quantitative evaluation in radial and azimuthal directions.

Main Results:

  • Successful generation of a (l, p) = (1, 0) LG radially polarized state with 98% purity.
  • Demonstration of VFR's capability to derive complex amplitude distributions.
  • Validation of cylindrically polarized LG modal decomposition for analyzing mode purities and contaminations.

Conclusions:

  • The VFR technique provides a significant advancement for analyzing polarization structured beams.
  • VFR is essential for detailed characterization of beams generated by lasers and optical converters.
  • LG modal decomposition offers valuable insights into experimental results of VBS analysis.